TRANSIENT RADIATION EFFECTS IN CAPACITORS AND DIELECTRIC MATERIALS
Measurements of dielectric leakage, capacitance, electric strength, andd charge scattering phenomena were performed at the Kukla and Godiva III critical assemblies for tantalum and aluminum electrolytic, wax- and oilimpregnated paper, mylar, mica, and ceramic capacitors, and for mylar and Vitamin B-impregnated paper. Leakage data indicate that gamma induced conductivity in capacitor dielectric varies directly with gamma DELTA , where gamma is the gamma radiation rate and DELTA is 0.9 for mylar, 0.7 for Vitamin Q-impregnated paper, and approximately 1.0 for the other dielectrics. A small portion of the tantalum oxide conductivity induced by gamma radiation exhibited a recovery time of approximately 150 mu s. Transient capacitance changes due to radiation were non- existent within plus or minus 0.1% for mica and Vitamin Q capacitors. Transient charging of tantalum capacitors was noted during irradiation with no applied voltage. No drastic changes in electric strength were noted during irradiation of mylar and Vitamin Q-impregnated paper. Results are compared with a summary of data previously collected by others. The use of test data in parametric form as a tool for predicting transient radiation effects is discussed. (auth)
- Research Organization:
- Boeing Co., Seattle, WA (United States)
- Sponsoring Organization:
- USAEC, Washington, DC (United States); USAF, USDOD, Washington, DC (United States)
- NSA Number:
- NSA-18-002381
- OSTI ID:
- 4877879
- Report Number(s):
- CONF-299-1; D2-90173
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CAPACITORS
CERAMICS
CRITICAL ASSEMBLIES
DIELECTRICS
ELECTRIC CONDUCTIVITY
ELECTRIC POTENTIAL
ELECTRICITY
ELECTROLYTIC CELLS
GAMMA RADIATION
GODIVA-2
IMPREGNATION
KUKLA
MATERIALS TESTING
MEASURED VALUES
METALS, CERAMICS, AND OTHER MATERIALS
MICA
MYLAR
OILS
PAPER
PARAFFIN
POLYESTERS
RADIATION EFFECTS
RECOVERY
SCATTERING
TANTALUM
TANTALUM OXIDES
TRANSIENTS
VARIATIONS
VITAMIN A
VITAMINS